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DC/DC CONVERTERS
High Current, High Efficiency, Low Profile
2
NEW Product
File Name: quarter_brick_single.pdf Rev (06): 09 Nov 2004
Notes
1
di/dt = 1A/s, Vin = 48VDC, Tc = 25°C, load change = 50% to 75% lo
max. and 75% to 50% lo max. Deviation varies by model. For further
details see longform datasheet.
2
Start-up into resistive load.
3
This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
4
Recommended input fusing is up to 10A HRC 200V rated fuse.
Quarter-Brick Series
Single output
LQS60A48-3V3RAN
Part Number System with Options
L = Low Profile
Q = 1/4 Brick
Type of output
S = Single
Rated Output Current
40A = 40Amps, 60A = 60Amps etc.
Nominal Rated Input Voltage
24 = 24Volts (18 to 36V range)
48 = 48Volts (36 to 75V range)
Remote ON/OFF Logic
Blank = Positive
R = Negative
Output Voltage
1V5 = 1.5 Volts, 1V8 = 1.8 Volts etc.
Pin Length Options
Blank = 0.188” (4.78mm)
N = 0.145” (3.68mm)
K = 0.110” (2.79mm)
Body Height, Package Type and Pin Length
A = 0.300” (7.62 mm), Through Hole,
0.188” (4.78 mm) Pins
E = 0.340” (8.64 mm), Through Hole,
0.188” (4.78 mm) Pins
S = 0.28” (7.11mm), Surface Mount(6)
OUTPUT
INPUT
OUTPUT
EFFICIENCY
REGULATION
MODEL
VOLTAGE
CURRENT
RIPPLE
CURRENT
(TYP.)
SET POINT
LINE
LOAD
RIPPLE &
NUMBER (6)
(MAX.) (4)
CURRENT (5)
(MAX.)
ACCURACY
NOISE
MAX
(pk - pk)
48Vin VALUE MODELS
1.2V
1.92A
150mA
50A
88.5%
±1.5%
±0.1%
±0.2%
60mV
LQS50A48-1V2
1.5V
2.36A
150mA
50A
89.5%
±1.5%
±0.1%
±0.2%
60mV
LQS50A48-1V5
1.8V
2.82A
150mA
50A
90.4%
±1.5%
±0.1%
±0.2%
60mV
LQS50A48-1V8
48Vin PERFORMANCE MODELS
1.2V
4.05A
250mA
100A
86.0%
±1.5%
±0.1%
±0.2%
60mV
LQS100A48-1V2
1.5V
3.80A
200mA
80A
88.8%
±1.5%
±0.1%
±0.2%
60mV
LQS80A48-1V5
1.8V
4.60A
200mA
80A
90.0%
±1.5%
±0.1%
±0.2%
60mV
LQS80A48-1V8
2.5V
4.10A
200mA
50A
90.0%
±1.5%
±0.1%
±0.2%
60mV
LQS50A48-2V5
3.3V
5.20A
200mA
50A
91.0%
±1.5%
±0.1%
±0.2%
60mV
LQS50A48-3V3
48Vin ULTRA MODELS
1.5V
4.80A
200mA
100A
88.5%
±1.5%
±0.1%
±0.2%
60mV
LQS100A48-1V5
1.8V
5.70A
200mA
100A
89.5%
±1.5%
±0.1%
±0.2%
60mV
LQS100A48-1V8
2.5V
6.20A
200mA
80A
91.0%
±1.5%
±0.1%
±0.2%
60mV
LQS80A48-2V5
3.3V
6.20A
200mA
60A
91.0%
±1.5%
±0.1%
±0.2%
60mV
LQS60A48-3V3
5.0V
6.20A
200mA
40A
92.0%
±1.5%
±0.1%
±0.2%
60mV
LQS40A48-5V0
24Vin MODELS
1.8V
3.4A
200mA
30A
91.0%
±1.5%
±0.1%
±0.2%
60mV
LQS30A24-1V8
3.3V
6.5A
300mA
30A
89.5%
±1.5%
±0.1%
±0.2%
60mV
LQS30A24-3V3
5
Peak to peak measured without external π filter. Significant reduction
possible with external filter. See Application Note 141 for further details.
6
‘S’ option applies to the 24V models only.
7
Except LQS40A48-5V0 which has the double output pins.
8
Active low Remote ON/OFF is available. Standard product is Active
High. When ordering active low parts, designate wit the Suffix ‘R’ e.g.
LQS100A48-1V8RA.